To provide a buffer material for packaging in which the whole material is constituted with the recyclable and foldable sheet, a hollow body is provided and its bulk density is relatively small, and the buffer material is difficult to deform while the buffer material is set to an article to be packaged and packed in an external box.

A groove-shaped holding body 1 having a raised bottom part 10 and side walls 11, 11 in which one end part of a rectangular parallelepiped or cubic article 4 to be packaged is inserted, and a pair of end part support bodies 2, 2 which are installed to cover each end part of the groove-shaped holding body 1, provided with a plurality of hollow parts 20 arranged in parallel in the prescribed direction, and rectangular in the sectional contour orthogonal to the longitudinal direction of the follow part 20, are provided, and the groove- shaped holding body 1 and the end part support bodies 2, 2 are formed by folding the sheet along the valley-folding line and the ridge-folding line formed in one sheet of the prescribed plane shape.